SYSTEM REQUIREMENTS

HOW TO INSTALL THE PATCH

Run the patch exe to apply the patch setup automatically.

It will install all content of the patch to the folder with your Arma 2: Operation Arrowhead installation.

Please note that it is not possible to rollback to a previous version after the installation of this patch, only a full reinstall of the game is possible, if you want to keep your previous version you may want to backup the entire game installation folder before applying this patch.

NOTE: This patch will also update your ARMA 2 1.05 to 1.08 and ARMA 2 BAF 1.00 to 1.01 if necessary.

Version 1.55 Highlights

Numerous stability and functionality fixes and improvements

Reworked MP SP/MP Mission Selector

Various visual optimizations and fidelity additions

Added many new scripting commands and event-handlers

AI behaviour related fixes and improvements

Version 1.54-1.55 Changelog

Engine

Fixed: Subordinates would ignore their leaders' GetIn/GetOut commands in some MP situations.

Fixed: Relative formation command (advance/fallback/flank) now working as expected.

Improved: AI mounting vehicles or catching up with formation covering a bit less to move faster.

New: Expansions possibly registered in Windows Registry (by some future setups) are loaded and available through ModLauncher. When used with -mod commandline the prefix '%' should be used, such as -mod=%someInstalledMod.

New: Multiplayer Event Handlers MPKilled and MPHit. Their event handlers are synchronized over network to be the same on all clients. Moreover, when the MPKilled or MPHit event occurs it is triggered on all clients, ie. it works in global manner. Use them by new scripting commands addMPEventHandler, removeMPEventHandler and removeAllMPEventHandlers.

Fixed: Join group changes unit's side

Changed: Airplanes parallax HUD disabled, can be enabled by "enableParallax" in config